Nominal: "A nominal variable has attributes that are merely different, as distinguished from ordinal, interval, or ratio measures" (Babbie 139)
Measure the Chinese tourists' attitudes with normal measurements?
Ordinal
"A level of measurement describing a variable with attributes we can rank- order along some dimension." (Babbie 140)
Measure the Chinese tourists' attitudes with normal measurements?
Interval
"A level of measurement describing a variable whose attributes are rank- ordered and have equal distances between adjacent attributes." (Babbie 140)
Measure the Chinese tourists' attitudes with normal measurements?
Ratio
"The attributes composing a variable, besides having all the structural characteristics mentioned previously, are based on a true zero point. " (Babbie 140)
Measure the Chinese tourists' attitudes with normal measurements?
Assumption behand the measurement levels
Nominal: only categorical differences, no intensity, no order.
Ordinal: equivalent differences between categories.
Interval: difference + order; not exactly how much different.
Ratio: values are homogeneous and can be calculated.